Segment Information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		9 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018	Sep. 30, 2018	Dec. 30, 2018
Segment Information
Total revenues	$ 399,623	$ 395,834	$ 385,231	$ 429,952	$ 798,028	$ 880,074	$ 1,265,305	$ 1,661,139
Income (loss) before income taxes	9,959	(15,252)	(20,228)	19,113	9,192	42,177	21,949	6,697
Accumulated depreciation and amortization	(444,762)				(444,762)
Property and equipment, net	212,257	226,894			212,257			226,894
Domestic Company-owned restaurants
Segment Information
Total revenues	163,656			181,379	325,459	371,621
North America commissary
Segment Information
Total revenues	147,128			153,455	296,032	315,168
North America franchising
Segment Information
Total revenues	19,761			23,912	37,291	48,718
Special charges	2,500				7,700
International
Segment Information
Total revenues	25,497			29,069	51,164	59,183
Refranchising loss, net				1,900		1,900
Other segment
Segment Information
Total revenues	43,581	$ 41,620	$ 42,247	42,137	88,082	85,384	$ 127,631	$ 169,251
Operating segments
Segment Information
Total revenues	399,623			429,952	798,028	880,074
Operating segments | Domestic Company-owned restaurants
Segment Information
Total revenues	163,656			181,379	325,459	371,621
Income (loss) before income taxes	7,712			8,304	12,309	15,533
Property and equipment, gross	217,340				217,340
Operating segments | North America commissary
Segment Information
Total revenues	147,128			153,455	296,032	315,168
Income (loss) before income taxes	7,792			8,730	15,304	17,340
Property and equipment, gross	140,395				140,395
Operating segments | North America franchising
Segment Information
Total revenues	19,761			23,912	37,291	48,718
Income (loss) before income taxes	17,910			21,380	33,601	43,739
Operating segments | International
Segment Information
Total revenues	31,420			34,652	62,920	70,184
Income (loss) before income taxes	5,403			2,278	10,720	5,815
Property and equipment, gross	15,946				15,946
Operating segments | Other segment
Segment Information
Total revenues	37,658			36,554	76,326	74,383
Income (loss) before income taxes	(1,209)			(2,843)	(1,715)	(2,528)
Property and equipment, gross	77,868				77,868
Elimination
Segment Information
Total revenues	(65,828)			(68,381)	(127,564)	(142,021)
Income (loss) before income taxes	242			588	(671)	(268)
Elimination | North America commissary
Segment Information
Total revenues	(46,962)			(51,492)	(92,517)	(107,366)
Elimination | North America franchising
Segment Information
Total revenues	(787)			(1,016)	(1,460)	(2,035)
Elimination | International
Segment Information
Total revenues	(94)			(73)	(191)	(143)
Elimination | Other segment
Segment Information
Total revenues	(17,985)			(15,800)	(33,396)	(32,477)
Unallocated corporate
Segment Information
Income (loss) before income taxes	(27,891)			$ (19,324)	(60,356)	$ (37,454)
Property and equipment, gross	205,470				205,470
Special charges	$ 2,900				$ 13,500